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v410dec.c
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1 /*
2  * v410 decoder
3  *
4  * Copyright (c) 2011 Derek Buitenhuis
5  *
6  * This file is part of FFmpeg.
7  *
8  * FFmpeg is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2.1 of the License, or (at your option) any later version.
12  *
13  * FFmpeg is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with FFmpeg; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22 
23 #include "libavutil/common.h"
24 #include "libavutil/intreadwrite.h"
25 #include "avcodec.h"
26 #include "internal.h"
27 
29 {
31  avctx->bits_per_raw_sample = 10;
32 
33  if (avctx->width & 1) {
34  if (avctx->err_recognition & AV_EF_EXPLODE) {
35  av_log(avctx, AV_LOG_ERROR, "v410 requires width to be even.\n");
36  return AVERROR_INVALIDDATA;
37  } else {
38  av_log(avctx, AV_LOG_WARNING, "v410 requires width to be even, continuing anyway.\n");
39  }
40  }
41 
42  return 0;
43 }
44 
45 static int v410_decode_frame(AVCodecContext *avctx, void *data,
46  int *got_frame, AVPacket *avpkt)
47 {
48  AVFrame *pic = data;
49  uint8_t *src = avpkt->data;
50  uint16_t *y, *u, *v;
51  uint32_t val;
52  int i, j, ret;
53 
54  if (avpkt->size < 4 * avctx->height * avctx->width) {
55  av_log(avctx, AV_LOG_ERROR, "Insufficient input data.\n");
56  return AVERROR(EINVAL);
57  }
58 
59  if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
60  return ret;
61 
62  pic->key_frame = 1;
64 
65  y = (uint16_t *)pic->data[0];
66  u = (uint16_t *)pic->data[1];
67  v = (uint16_t *)pic->data[2];
68 
69  for (i = 0; i < avctx->height; i++) {
70  for (j = 0; j < avctx->width; j++) {
71  val = AV_RL32(src);
72 
73  u[j] = (val >> 2) & 0x3FF;
74  y[j] = (val >> 12) & 0x3FF;
75  v[j] = (val >> 22);
76 
77  src += 4;
78  }
79 
80  y += pic->linesize[0] >> 1;
81  u += pic->linesize[1] >> 1;
82  v += pic->linesize[2] >> 1;
83  }
84 
85  *got_frame = 1;
86 
87  return avpkt->size;
88 }
89 
91  .name = "v410",
92  .long_name = NULL_IF_CONFIG_SMALL("Uncompressed 4:4:4 10-bit"),
93  .type = AVMEDIA_TYPE_VIDEO,
94  .id = AV_CODEC_ID_V410,
95  .init = v410_decode_init,
96  .decode = v410_decode_frame,
97  .capabilities = AV_CODEC_CAP_DR1,
98 };
const char const char void * val
Definition: avisynth_c.h:771
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
This structure describes decoded (raw) audio or video data.
Definition: frame.h:184
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:101
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
int size
Definition: avcodec.h:1591
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1887
static av_cold int v410_decode_init(AVCodecContext *avctx)
Definition: v410dec.c:28
int bits_per_raw_sample
Bits per sample/pixel of internal libavcodec pixel/sample format.
Definition: avcodec.h:3060
AVCodec.
Definition: avcodec.h:3573
uint8_t
#define av_cold
Definition: attributes.h:82
uint8_t * data
Definition: avcodec.h:1590
#define av_log(a,...)
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
#define AVERROR(e)
Definition: error.h:43
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:176
const char * name
Name of the codec implementation.
Definition: avcodec.h:3580
#define AV_PIX_FMT_YUV444P10
Definition: pixfmt.h:346
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:258
int err_recognition
Error recognition; may misdetect some more or less valid parts as errors.
Definition: avcodec.h:2947
int width
picture width / height.
Definition: avcodec.h:1846
AVCodec ff_v410_decoder
Definition: v410dec.c:90
#define AV_EF_EXPLODE
abort decoding on minor error detection
Definition: avcodec.h:2958
#define src
Definition: vp9dsp.c:530
static int v410_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: v410dec.c:45
Libavcodec external API header.
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:215
main external API structure.
Definition: avcodec.h:1659
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Get a buffer for a frame.
Definition: utils.c:928
#define u(width,...)
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:198
common internal api header.
common internal and external API header
int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:253
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:87
This structure stores compressed data.
Definition: avcodec.h:1567
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:958
for(j=16;j >0;--j)